CN104600879A - Stator structure of low-speed pole-slot matched permanent magnet motor based on oriented silicon steel plate - Google Patents
Stator structure of low-speed pole-slot matched permanent magnet motor based on oriented silicon steel plate Download PDFInfo
- Publication number
- CN104600879A CN104600879A CN201510063308.5A CN201510063308A CN104600879A CN 104600879 A CN104600879 A CN 104600879A CN 201510063308 A CN201510063308 A CN 201510063308A CN 104600879 A CN104600879 A CN 104600879A
- Authority
- CN
- China
- Prior art keywords
- monodentate
- oriented
- stator
- steel sheet
- grain
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/12—Stationary parts of the magnetic circuit
- H02K1/14—Stator cores with salient poles
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The invention discloses a stator structure of a low-speed pole-slot matched permanent magnet motor based on an oriented silicon steel plate and belongs to the technical field of motors. The rolling direction of the oriented silicon steel plate and the radial direction of the stator of the motor coincide, allowing the magnetic force line of the stator to be consistent with the rolling direction (high permeability direction) of the oriented silicon steel plate; by the advantages of high permeability of the rolling direction of the oriented silicon steel plate, saturated operating point is improved, magnetomotive force generated by stator current is increased, accordingly tooth magnetic flux density and air-gap magnetic flux density of the stator are improved, and torque density under unit volume of the motor is increased; both two structures are in single-tooth forming concentrated winding structures, slot filling rate is higher, and torque density is further increased; besides, the oriented silicon steel plate is perpendicular to the rolling direction, leading to low permeability, thus zigzag leakage of the motor is restrained, and torque pulsation of the motor is decreased.
Description
Technical field
The invention belongs to technical field of motors, being specifically related to a kind of stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet.
Background technology
Under low speed proximal pole groove permanent magnet torque motor refers to and operates in and often run lower-speed state, number of poles and the comparatively close torque motor of groove number.This kind of motor has the outstanding advantages such as structure is simple, efficiency is high, power density is high, winding overhang is short, torque pulsation is low, is widely used in Direct driver fields such as industrial equipment automatic machinery people, multi-shaft linkage numerical control machines.Because the need for environment motor applied runs under lower-speed state, so need during design of electrical motor to increase number of poles, proximal pole groove permanent magnet torque motor adopts the form of fractional slot winding distribution, and efficiently solving number of poles in conventional integer groove design of electrical motor increases but the limited contradiction of groove number.At present, the research of proximal pole groove permanent magnet torque motor mainly concentrates on the Torque optimization of motor, wish that motor can export higher torque under limited volume, in other words, make it have higher torque density, wish that again motor can have lower torque ripple, to ensure driven object traveling comfort.But traditional this motor adopts non-oriented silicon steel sheet to make usually, from the permeance angle of material self, limit the further lifting of its torque performance.
Summary of the invention
For the bottleneck problem of existing technology, the present invention proposes a kind of stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet, improve stator teeth magnetic flux density and air gap flux density to reach, suppress the zigzag leakage of motor, reduce the object of motor torque ripple.
A kind of stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet, this stator structure is applied to proximal pole groove magneto, comprising multiplely has grain-oriented Si steel sheet monodentate structure, described monodentate vibrational power flow is on support, and along the circumferential direction arrange, the side, yoke portion of monodentate structure is provided with projection, and opposite side is provided with groove, and adjacent monodentate structure is fixedly connected with by assembled.
A kind of stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet, this stator structure comprises multiplely has grain-oriented Si steel sheet monodentate structure and yoke portion structure, described yoke portion vibrational power flow is on support, yoke portion vibrational power flow has multiple groove, and above-mentioned groove inner wall side is provided with projection; Described monodentate structure is along the circumferential direction arranged, side, monodentate structure bottom arrange jut have with yoke portion texture grooves inner projection with the use of groove, monodentate structure is fixedly connected with yoke portion structure.
The rolling direction of described monodentate structure is stator structure radial direction.
Described monodentate structure is provided with armature winding.
Described monodentate structure is in axial direction laminated by monodentate punching and is formed.
Described yoke portion texture grooves number is identical with monodentate structure.
Advantage of the present invention:
A kind of stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet of the present invention, there is grain-oriented Si steel sheet rolling direction to overlap with motor stator radial direction, making stator magnet line of force direction consistent with there being the rolling direction of grain-oriented Si steel sheet (high magnetic property direction); Utilize and have the feature that grain-oriented Si steel sheet rolling direction magnetic property is good, operate in saturation point can be improved, the magnetomotive force that stator current is produced increases, thus improves stator teeth magnetic flux density and air gap flux density, reaches the object of the torque density under raising motor unit volume; In two kinds of structures, all have employed the structure of the shaping concentratred winding of monodentate, effectively improve copper factor, increase torque density further; There is grain-oriented Si steel sheet low perpendicular to rolling direction permeability simultaneously, inhibit again the zigzag leakage of motor better, thus reduce the torque pulsation of motor.
Accompanying drawing explanation
Fig. 1 is the external rotor proximal pole groove permanent magnetic ring-shaped moment motor structural representation of an embodiment of the present invention;
Fig. 2 is the monodentate splicing structure schematic diagram of an embodiment of the present invention, and wherein, figure (a) is stator structure, and figure (b) is monodentate structure;
Fig. 3 is the monodentate gear shaping structural representation of an embodiment of the present invention, and wherein, figure (a) is stator structure, and figure (b) is yoke portion structure; Figure (c) is monodentate structure;
Fig. 4 is orientation and the non-oriented silicon steel sheet motor torque oscillogram of an embodiment of the present invention;
Fig. 5 is two kinds of silicon steel sheet motor torque fluctuation Fourier decomposition schematic diagrames of an embodiment of the present invention, wherein, figure (a), for there being grain-oriented Si steel sheet motor torque fluctuation Fourier decomposition schematic diagram, schemes (b) non-oriented silicon steel sheet motor torque fluctuation Fourier decomposition schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, an embodiment of the present invention is described further.
As shown in Figure 1, be external rotor proximal pole groove permanent magnetic ring-shaped moment motor structural representation; The present invention adopts proximal pole groove permanent magnet torque motor, number of poles and the groove number of this motor are close, MgO-ZrO_2 brick approximates 1, main flux is from a magnetic pole, the stator tooth closed on is entered by air gap, then walk around stator winding through stator yoke, then get back to two incorgruous magnetic poles magnetized adjacent with former magnetic pole by the tooth that both sides are adjacent; Therefore, comparatively conventional integer groove motor is compared, and this motor magnetic circuit is based on teeth portion radial magnetic circuit, and the close high magnetic circuit of magnetic is long, and the tangential magnetic circuit in yoke portion is short and magnetic is close low.And if according to the saturated thickness designing yoke portion of yoke portion magnetic close knee point, then the mechanical strength in yoke portion is inadequate, therefore also needs to strengthen yoke portion thickness; Known through simulation calculation, the yoke portion magnetic flux density of this motor can only reach 1/3rd of the close maximum of tooth magnetic, and this characteristic is have the application of grain-oriented Si steel sheet to provide condition.
The characteristic of grain-oriented Si steel sheet is had to be, there is grain-oriented Si steel sheet rolling direction magnetic Mi Keda 2.0T, vertical rolling direction magnetic secret agreement is 1.4T, and non-directional cold-rolling silicon steel disc magnetic close be 1.6T, consider that the saturation characteristic of silicon steel sheet is known, under high magnetic flux density, carry high-magnetodensity and need increase exponentially magnetic field intensity, therefore, in the motor that non-oriented silicon steel sheet manufactures, torque density can not be increased by the method increasing electric current merely.
Based on above feature, the present invention proposes employing has grain-oriented Si steel sheet to make proximal pole groove permanent-magnetic synchronous motor stator iron core; Its concrete implementing method has two kinds, as described below:
Embodiment 1: monodentate splicing structure
As shown in Figure 2, wherein, 1 is the first rotor yoke portion to monodentate splicing structure schematic diagram, and 2 is the first rotor magnetic pole, and 3 is first have grain-oriented Si steel sheet monodentate structure, and 4 is the first stator armature winding.
In the embodiment of the present invention 1, adopt with monodentate burst moulding process, to have grain-oriented Si steel sheet for rapidoprint.As schemed shown in (a) in Fig. 2, stator structure comprises multiple first has grain-oriented Si steel sheet monodentate structure 3, the first to have grain-oriented Si steel sheet monodentate structure 3 to comprise tooth top, teeth portion and yoke portion; Monodentate is along the circumferential direction with the assembled stator structure of center radiation arrangement, and first has the side, yoke portion of grain-oriented Si steel sheet monodentate structure 3 to be provided with projection, and opposite side is provided with groove, and adjacent monodentate structure is fixedly connected with by assembled;
As schemed shown in (b) in Fig. 2, the described grain-oriented Si steel sheet rolling direction that has overlaps with motor stator radial direction, makes stator magnet line of force direction consistent with silicon steel sheet height magnetic property direction; Utilize and have the feature that grain-oriented Si steel sheet rolling direction magnetic property is good, operate in saturation point can be improved, the magnetomotive force that stator current is produced increases, thus improves stator teeth magnetic flux density and air gap flux density, and the torque density under motor unit volume and average torque phase should be improved.
As schemed, shown in (a), described monodentate structure to be provided with the first stator armature winding 4 in Fig. 2; First stator armature winding 4 is first wrapped in monodentate structure, then carries out grafting; Monodentate structure is in axial direction laminated by monodentate punching and is formed;
Due to the number of poles of low speed proximal pole groove motor and groove number very close, each groove is a corresponding pole almost, low speed needs again to adopt multi-polar structure, so the tooth magnetic of this kind of motor is close close higher than yoke portion magnetic largely, and yoke portion often amplifies to meet the requirement of mechanical strength, these factors meet the service condition of grain-oriented Si steel sheet, in actual applications, should note rolling direction.
Embodiment 2: monodentate gear shaping structure
As shown in Figure 3, wherein, 5 is the second rotor yoke to monodentate splicing structure schematic diagram, and 6 is the second rotor magnetic pole, and 7 is second have grain-oriented Si steel sheet monodentate structure, and 8 is the second stator armature winding, and 9 is yoke portion structure;
In the embodiment of the present invention 2, monodentate structure adopts burst moulding process equally, and have grain-oriented Si steel sheet to be rapidoprint, rolling direction is radial direction; As schemed shown in (a) in Fig. 3, stator structure comprises multiple second grain-oriented Si steel sheet monodentate structure 7 and yoke portion structure 9, described yoke portion structure 9 is arranged at outside support, as schemed shown in (b) in Fig. 3, yoke portion vibrational power flow has multiple groove, and above-mentioned groove inner wall side is provided with projection; As schemed shown in (c) in Fig. 3, side, monodentate structure bottom be provided with yoke portion texture grooves inner projection with the use of groove, monodentate structure is fixedly connected with yoke portion structure; Described yoke portion texture grooves number is identical with monodentate structure.
In the embodiment of the present invention, yoke portion structure selects 10 steel, and during frock, the second stator armature winding 8 is first wrapped in second has in grain-oriented Si steel sheet monodentate structure 7, then inserts yoke portion structure 9; Monodentate structure is in axial direction laminated by monodentate punching and is formed;
For 96 groove 80 pole motors, analyze the difference having grain-oriented Si steel sheet and traditional non-oriented silicon steel sheet to show in motor torque performance; Motor all adopts outer-rotor structure, and rotor inner headed face installs surface-mount type permanent magnet pole.Pole material is neodymium iron boron; Stator has adopted grain-oriented Si steel sheet and non-orientation silicon steel sheet material respectively, but size is consistent, and input sine wave current effective value is 13A.
In the embodiment of the present invention, the concrete size of motor is in table 1:
Table 1
The present invention adopts ANSOFT to carry out simulation calculation, and two kinds of steel disc material motor torque performance comparison are as shown in table 2:
Table 2
According to FEM Numerical Simulation, as seen from Figure 4, employing has the torque motor of grain-oriented Si steel sheet to show higher average torque, under same nominal power, the average torque of two kinds of motors is respectively 917Nm and 1018Nm, has grain-oriented Si steel sheet motor torque to promote and reaches 11.01%.Through calculating, the motor magnetic flux density working point of tradition non-orientation silicon steel sheet material is 1.6T, when there being grain-oriented Si steel sheet motor magnetic magnetic flux density working point to be taken as 1.8T, exceeds 12.5%, from result of calculation, the enhancing of motor-field increases the average torque of motor linearly.In addition, the torque pulsation of grain-oriented Si steel sheet motor is had also to be starkly lower than non-oriented silicon steel sheet.
The present invention carries out Fourier decomposition to the motor electromagnetic torque run under idle condition.Proximal pole groove motor torque ripple is mainly containing 6 times and 12 subharmonic, and research shows, zigzag leakage is again the main source of 6 times and the generation of 12 subharmonic, as schemed, shown in (a) and figure (b), have oriented material obvious to these two kinds of times harmonic inhibitory action in Fig. 5.
The Be very effective being applied in the zigzag leakage aspect reducing proximal pole groove permanent magnet torque motor of oriented electromagnetic steel plate can be verified.This improvement of will directly react on the electromagnetic torque fluctuation of motor.
In sum, adopt and have grain-oriented Si steel sheet as stator material, improve the magnetic flux density of unit volume, the average Driving Torque of motor can be improved; Meanwhile, because steel disc is lower perpendicular to rolling direction permeability, inhibit zigzag leakage, can torque pulsation be reduced.
Claims (6)
1. one kind based on the stator structure of low speed proximal pole groove magneto having grain-oriented Si steel sheet, it is characterized in that, this stator structure is applied to proximal pole groove magneto, comprising multiplely has grain-oriented Si steel sheet monodentate structure, described monodentate vibrational power flow on support, and is along the circumferential direction arranged, and the side, yoke portion of monodentate structure is provided with projection, opposite side is provided with groove, and adjacent monodentate structure is fixedly connected with by assembled.
2. one kind based on the stator structure of low speed proximal pole groove magneto having grain-oriented Si steel sheet, it is characterized in that, this stator structure comprises multiplely has grain-oriented Si steel sheet monodentate structure and yoke portion structure, described yoke portion vibrational power flow is on support, yoke portion vibrational power flow has multiple groove, and above-mentioned groove inner wall side is provided with projection; Described monodentate structure is along the circumferential direction arranged, side, monodentate structure bottom arrange jut have with yoke portion texture grooves inner projection with the use of groove, monodentate structure is fixedly connected with yoke portion structure.
3. the stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet according to claim 1 and 2, it is characterized in that, the rolling direction of described monodentate structure is stator structure radial direction.
4. the stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet according to claim 1 and 2, is characterized in that, described monodentate structure is provided with armature winding.
5. the stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet according to claim 1 and 2, it is characterized in that, described monodentate structure is in axial direction laminated by monodentate punching and is formed.
6. the stator structure of low speed proximal pole groove magneto based on there being grain-oriented Si steel sheet according to claim 2, it is characterized in that, described yoke portion texture grooves number is identical with monodentate structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063308.5A CN104600879A (en) | 2015-02-06 | 2015-02-06 | Stator structure of low-speed pole-slot matched permanent magnet motor based on oriented silicon steel plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510063308.5A CN104600879A (en) | 2015-02-06 | 2015-02-06 | Stator structure of low-speed pole-slot matched permanent magnet motor based on oriented silicon steel plate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104600879A true CN104600879A (en) | 2015-05-06 |
Family
ID=53126479
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510063308.5A Pending CN104600879A (en) | 2015-02-06 | 2015-02-06 | Stator structure of low-speed pole-slot matched permanent magnet motor based on oriented silicon steel plate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104600879A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110987A (en) * | 2017-12-21 | 2018-06-01 | 沈阳工业大学 | Bimorph transducer has grain-oriented Si steel sheet permanent-magnetism linear motor without mover yoke |
| CN108880009A (en) * | 2018-05-30 | 2018-11-23 | 沈阳工业大学 | A kind of stator of not equal teeth permanent magnet torque motor |
| CN113746234A (en) * | 2021-09-07 | 2021-12-03 | 西安邮电大学 | Motor salient pole rotor made of oriented silicon steel |
| US11575290B2 (en) | 2018-09-19 | 2023-02-07 | Gree Electric Appliances, Inc. Of Zhuhai | Motor stator with tooth crest air gap, motor and bus |
-
2015
- 2015-02-06 CN CN201510063308.5A patent/CN104600879A/en active Pending
Non-Patent Citations (1)
| Title |
|---|
| 方日杰: "《电机制造工艺学》", 31 May 1995 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108110987A (en) * | 2017-12-21 | 2018-06-01 | 沈阳工业大学 | Bimorph transducer has grain-oriented Si steel sheet permanent-magnetism linear motor without mover yoke |
| CN108110987B (en) * | 2017-12-21 | 2024-01-19 | 沈阳工业大学 | Double-stator rotor-free yoke oriented silicon steel sheet permanent magnet linear motor |
| CN108880009A (en) * | 2018-05-30 | 2018-11-23 | 沈阳工业大学 | A kind of stator of not equal teeth permanent magnet torque motor |
| US11575290B2 (en) | 2018-09-19 | 2023-02-07 | Gree Electric Appliances, Inc. Of Zhuhai | Motor stator with tooth crest air gap, motor and bus |
| CN113746234A (en) * | 2021-09-07 | 2021-12-03 | 西安邮电大学 | Motor salient pole rotor made of oriented silicon steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106374718B (en) | Concentrated magnetic replaces pole vernier magneto and its application | |
| Madhavan et al. | Performance improvement in the axial flux-segmented rotor-switched reluctance motor | |
| WO2016115722A1 (en) | Permanent magnet synchronous motor | |
| EP2741400B1 (en) | Motor rotor and motor having same | |
| CN106602823A (en) | Double-claw-pole-stator magnetic gathering type vernier motor | |
| CN204928389U (en) | Compact stator core | |
| EP2846443A2 (en) | Three-phase electromagnetic motor | |
| CN104600879A (en) | Stator structure of low-speed pole-slot matched permanent magnet motor based on oriented silicon steel plate | |
| CN105162301A (en) | High-reluctance torque concentrated winding permanent magnet synchronous motor | |
| CN202405896U (en) | Rotor core and high-efficiency variable-frequency speed regulation permanent magnet synchronous motor with same | |
| CN204408032U (en) | A kind of monodentate gear shaping stator structure of low speed proximal pole groove magneto | |
| Bonthu et al. | Design of permanent magnet assisted synchronous reluctance motor with external rotor architecture | |
| CN104065227A (en) | Flux-weakening method of doubly salient motor and wide speed governing doubly salient hybrid excitation motor | |
| JP2011103769A (en) | Permanent-magnet generator and hybrid vehicle using the same | |
| KR20170057386A (en) | Reluctance assisted external rotor pmsm | |
| Pop et al. | First insights on the electromagnetic design of axial-flux synchronous-reluctance maschine | |
| CN107240970A (en) | A kind of 12/10 permanent magnetism additive excitation switched reluctance machines | |
| Shen et al. | Evaluation of low-cost high-performance synchronous motors for ventilation application | |
| CN207410133U (en) | A kind of permanent magnetism power-assisted reluctance motor and its rotor structure | |
| CN104184284A (en) | Double-magnetic-circuit asynchronous-starting permanent magnet synchronous motor rotor | |
| CN106026448A (en) | Brushless motor for EPS | |
| CN205070632U (en) | Magnet steel rotor and PMSM | |
| CN204442130U (en) | A kind of permagnetic synchronous motor | |
| CN204408034U (en) | A kind of assembled stator structure of monodentate of low speed proximal pole groove magneto | |
| CN214314991U (en) | Topological structure of embedded composite permanent magnet type double-stator brushless motor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150506 |
|
| RJ01 | Rejection of invention patent application after publication |